Robin Chittenden / Peregrine falcon (Falco peregrinus) flying past spire, Norwich Cathedral, Norfolk, UK, June.

Robin Chittenden / Peregrine falcon (Falco peregrinus) on statue's head, Norwich Cathedral, Norfolk, UK, June

Terry Whittaker / 2020VISION / RSPB staff member Emma Cambell showing peregrines to young woman at RSPB 'Date With Nature Event' for learning about urban Peregrine falcon, Tate Modern, South Bank, London, UK, September 2011, RSPB G...

Mark Taylor / 'The Marble Cathedrals' - marble rocks dissolved and sculpted by water. Rio Tranquilo, Chile, March 2010.

Wild Wonders of Europe / Geslin / Herring gulls (Larus argentatus) perched on statues of the Saints in St Peter's Square, Vatican, Rome, Italy, March 2010

Peter Lewis / Sun rising through mist behind Salisbury Cathedral viewed across Harnham Water Meadows. Salisbury Wiltshire, England. March 2009

Angelo Gandolfi / Bicycle pilgrims resting in front of Santiago de Compostela cathedral, after cycling the Camino de Santiago ("Way of St. James"). Galicia, Spain, July 2008.

Wild Wonders of Europe / Geslin / Peregrine falcon (Falco peregrinus) chick with new rings, Sagrada familia cathedral, Barcelona, Spain, April 2009

Jose B. Ruiz / Granada cathedral, Spain

Jose B. Ruiz / Seville Cathedral floodlit at dusk, Spain

Robin Chittenden / Peregrine (Falco peregrinus) fledgling landing on cathedral roof, Norwich UK GB June 2018

Gavin Hellier / Timelapse of boats on the River Seine at night, next to Notre Dame, Paris, France, May 2016. Hellier

Gavin Hellier / Timelapse of boats on the River Seine at night, next to Notre Dame, Paris, France, May 2016. Hellier

Gavin Hellier / Timelapse of boats on the River Seine at night, next to Notre Dame, Paris, France, May 2016. Hellier

Gavin Hellier / Timelapse of boats on the River Seine, next to Notre Dame, Paris, France, May 2016. Hellier

Gavin Hellier / Timelapse of tourists outside Notre Dame, Paris, France, May 2016. Hellier

Gavin Hellier / View of Saint Basil's Cathedral, Red Square and the Kremlin at dusk, Moscow, Russia, May 2016. Hellier

Gavin Hellier / View of Saint Basil's Cathedral, Red Square and the Kremlin, Moscow, Russia, May 2016. Hellier

Gavin Hellier / View of the Cathedral of Christ the Saviour from the Bolshoy Kamenny Bridge over the Moskva River, Moscow, Russia, May 2016. Hellier

Gavin Hellier / Timelapse from day to night of Saint Basil's Cathedral, Red Square and the Kremlin, Moscow, Russia, May 2016. Hellier

Gavin Hellier / Timelapse of tourists visiting Red Square, Saint Basil's Cathedral and the Kremlin at night, Moscow, Russia, May 2016. Hellier

Gavin Hellier / Timelapse of tourists visiting Red Square, Saint Basil's Cathedral and the Kremlin, Moscow, Russia, May 2016. Hellier

Gavin Hellier / Timelapse of tourists visiting Red Square, Saint Basil's Cathedral and the Kremlin, Moscow, Russia, May 2016. Hellier

Juan Manuel Borrero / Cathedral of San Cristobal de las Casas. Chiapas. Mexico

Enrique Lopez-Tapia / Cathedral of Eivissa. Ibiza, Biodiversity and Culture UNESCO World Heritage Site, Ibiza, Spain, February.

Laurent Geslin / Feral pigeons (Columba livia) next to Cathedral, Strasbourg, France, November.

Pal Hermansen / Northern Lights Cathedral, Alta, Finnmark, Norway. June 2013.

Pal Hermansen / Northern Lights Cathedral, Alta, Finnmark, Norway. June 2013.

Nick Upton / Mute swan pair (Cygnus olor) swimming on the River Avon, Salisbury with the cathedral in the background, Wiltshire, UK, June.

Robin Chittenden / Peregrine falcon (Falco peregrinus) in flight, Norwich Cathedral, Norfolk, England, UK, June.

Robin Chittenden / Peregrine falcon (Falco peregrinus) in flight, Norwich Cathedral, Norfolk, England, UK, June.

Robin Chittenden / Peregrine falcon (Falco peregrinus) perched on statue at Norwich Cathedral, Norfolk, England, UK, June.

Robin Chittenden / Magpie (Pica pica) mobbing Peregrine falcon (Falco peregrinus) Norwich Cathedral, Norfolk, England, UK, June.

Robin Chittenden / Peregrine (Falco peregrinus) perched, Norwich Cathedral, Norfolk, England, UK, June.

Robin Chittenden / Norwich Cathedral, Norfolk, England, June 2015.

Robin Chittenden / Peregrine (Falco peregrinus) perched on statue at Norwich Cathedral, Norfolk, England, UK, June.

Robin Chittenden / Peregrine falcon (Falco peregrinus) landing on statue, Norwich Cathedral, Norfolk, England, UK, June.

Robin Chittenden / Peregrine falcon (Falco peregrinus) perched, Norwich Cathedral, Norfolk, England, Great Britain, UK, June.

Robin Chittenden / Peregrine falcon (Falco peregrinus) in flight with prey, Norwich Cathedral, Norfolk, England, Great Britain, UK, June.

Robin Chittenden / Peregrine (Falco peregrinus) in flight, in front of Norwich Cathedral, Norfolk, England, June.

Ross Hoddinott / Salisbury Cathedral and rainbow, Salisbury, Wiltshire, UK. July 2014

Will Watson / The River Wye in spate, the Medieval Old Wye Bridge and Hereford Cathedral, England, February 2014.

Gary K. Smith / Norwich cathedral, Norfolk, UK. November 2014.

Staffan Widstrand / Padlocks on the Pont de l'Archeveche bridge and Notre Dame Cathedral, with boat passing, Paris, France, October 2013.

Ross Hoddinott / Salisbury Cathedral in evening light, Salisbury, Wiltshire, UK. July 2014.

Ernie Janes / Feral pigeon (Columba livia) on the West front of Wells Cathedral, Somerset, UK, April.

Ernie Janes / Feral pigeon (Columba livia) on the West front of Wells Cathedral, Somerset, UK, April.

Ernie Janes / Feral pigeon (Columba livia) on the West front of Wells Cathedral, Somerset, UK, April.

Ernie Janes / Feral pigeon (Columba livia) on the West front of Wells Cathedral, Somerset, UK, April.

Robin Chittenden / Peregrine (Falco peregrinus) in flight near Norwich Cathedral, Norfolk, England, UK, Janaury

Robin Chittenden / Peregrine (Falco peregrinus) with prey, Norwich Cathedral, Norwich, England, UK, June.

David Tipling / White Storks (Ciconia ciconia) nesting on Alfaro Cathedral, La Rioja Spain, May 2010.

David Tipling / Medieval misericord depicting an owl being mobbed by birds, Gloucester Cathedral, Gloucester, England, UK, February 2011.

Robin Chittenden / Feral pigeon / Rock dove (Columba livia) perched on wall, Norwich Cathedral, Norwich, Norfolk, UK, June.

Robin Chittenden / Peregrine falcon (Falco peregrinus) flying past spire, another perched, Norwich Cathedral, Norwich, Norfolk, June.

Robin Chittenden / Peregrine falcon (Falco peregrinus) flying past Norwich Cathedral, Norwich, Norfolk, UK, June.

Robin Chittenden / Peregrine falcon (Falco peregrinus) flying past spire carrying prey, Norwich, Norfolk, Cathedral, June.

Robin Chittenden / Peregrine falcon (Falco peregrinus) in flight, Norwich Cathedral, Norfolk, UK, June.

Robin Chittenden / Peregrine falcon (Falco peregrinus) landing on statue's head, Norwich Cathedral, Norfolk, UK, June.

Will Watson / Worcester Cathedral, with the River Severn and swan sanctuary, Worcester, England, UK, May 2013.

Will Watson / Crane removing trees from debris raft trapped by Worcester Bridge due to record floods, Worcestershire, England, UK. 16th February 2014.

Will Watson / Black-headed gulls (Chroicocephalus ridibundus) on flooded sports ground, Worcester Cathedral, Worcestershire, England, UK, 16th February 2014.

Will Watson / Crane removing the debris raft trapped by Worcester Bridge due to record floods, Worcestershire, England, UK. 16th February 2014.

Will Watson / Crane removing the debris raft trapped by Worcester Bridge due to record floods, Worcestershire, England, UK. 16th February 2014.

Will Watson / Worcester Cathedral during record breaking floods, St. John's, Worcester, Worcestershire, England, 13th February 2014.

Will Watson / View of Worcester Cathedral with flooded road in the foreground, Worcester, England, UK, February 2014.

Will Watson / Floodwater in Worcester from the River Severn, with Mute Swans (Cygnus olor) and Worcester Cathedral in the background, Worcester, England, UK, February 2014.

Michele Westmorland / View of Basilica of the National Vow, seen Itchimbia Centro Cultural. Quito, Ecuador, August 2010.

Peter Lewis / Salisbury Cathedral at dawn, seen from across a meadow, Wiltshire, England, UK, March.

Peter Lewis / Salisbury Cathedral at dawn, seen from across a meadow, Wiltshire, England, UK, March.

Robin Chittenden / Peregrine (Falco peregrinus peregrinus) on statue at Norwich Cathedral, Norfolk, June 2013

Robin Chittenden / Peregrine (Falco peregrinus peregrinus) chick on roof, Norwich Cathedral, Norfolk, June 2013

Robin Chittenden / Peregrine (Falco peregrinus peregrinus) in flight by Norwich Cathedral, Norfolk, June 2013

Robin Chittenden / Peregrine (Falco peregrinus peregrinus) in flight by Norwich Cathedral, Norfolk, June 2013

Robin Chittenden / Peregrine (Falco peregrinus peregrinus) flying toward juvenile with prey, Norwich Cathedral, Norfolk, June 2013

Robin Chittenden / Peregrine (Falco peregrinus peregrinus) landing on a roof at Norwich Cathedral, June 2013

Robin Chittenden / Peregrine (Falco peregrinus peregrinus) juvenile with some down feathers, on ledge by Norwich Cathedral, Norfolk, June 2013

Robin Chittenden / Peregrine (Falco peregrinus peregrinus) calling, by window of Norwich Cathedral June 2013

Gavin Hellier / Cathedral of Christ the Saviour in Ploshchad Pobedy (Pobedy Square) Kaliningrad, Russia 2008

Gavin Hellier / Cathedral of the Assumption of the Virgin, built between 1880 and 1886 is the main symbol of the city with it's gold domes and stained glass windows, Varna, the chief city of the Black Sea, Bulgaria,...

Nick Turner / St. Davids Cathedral on the Pembrokeshire Coast Path, Wales, UK, June 2009.

Nick Turner / St. Davids Cathedral on the Pembrokeshire Coast Path, Wales, UK, June 2009.

Kerstin Hinze / Aerial view of Meissen, Albrechtsburg and Meissen Cathedral on the river Elbe, Saxony, Germany,

Bryan and Cherry Alexander / Cathedral of the Holy Trinity, the largest wooden cathedral in the World. Anadyr, Chukotka, Siberia, Russia, 2010

Bryan and Cherry Alexander / Whalebone arch in front of Christ Church Cathedral, Stanley, Falkland Islands, 2009.

Toby Roxburgh / Panorama of Cathedral and City Council buildings, Bristol, England, April 2009.

Nick Upton / Notre Dame de la Garde Cathedral, Marseille, France, May 2010.

Nick Upton / Notre Dame de la Garde Cathedral, Marseille, France, May 2010.

Angelo Gandolfi / The river Tiber at night with St Peter's cathedral, Vatican, background. Rome, Italy, December 2009

Angelo Gandolfi / Bridge over the river Tiber at night with St Peter's cathedral, Vatican, background. Rome, Italy, December

Bryan and Cherry Alexander / View of the Kremlin from the Moscow River. Moscow, Russia.

Bryan and Cherry Alexander / St. Basil's Cathedral in Red Square, Moscow, Russia.

RHONDA KLEVANSKY / A group of costumed dancers from the Oruro Carnival, sitting and bowing to the virgin in a Cathedral, Bolivia, February 2009.

Bryan and Cherry Alexander / Cathedral in Tromsdalen with snow capped mountain beyond. Norway, 2006.

Laurent Geslin / Flock of Feral pigeons (Columba livia) in front of Notre Dame, at dusk, Paris. France, November .

Juan Manuel Borrero / Inside Jaen cathedral, Jaen, Andalusia, Spain. April 2009.